4bur

From Proteopedia

(Difference between revisions)

Revision as of 18:03, 11 August 2016

Crystal structure of the reduced human Apoptosis inducing factor complexed with NAD

Structural highlights

4bur is a 4 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	4bv6
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[AIFM1_HUMAN] Defects in AIFM1 are the cause of combined oxidative phosphorylation deficiency type 6 (COXPD6) [MIM:300816]. It is a mitochondrial disease resulting in a neurodegenerative disorder characterized by psychomotor delay, hypotonia, areflexia, muscle weakness and wasting.^[1] ^[2]

Function

[AIFM1_HUMAN] Probable oxidoreductase that has a dual role in controlling cellular life and death; during apoptosis, it is translocated from the mitochondria to the nucleus to function as a proapoptotic factor in a caspase-independent pathway, while in normal mitochondria, it functions as an antiapoptotic factor via its oxidoreductase activity. The soluble form (AIFsol) found in the nucleus induces 'parthanatos' i.e. caspase-independent fragmentation of chromosomal DNA. Interacts with EIF3G,and thereby inhibits the EIF3 machinery and protein synthesis, and activates casapse-7 to amplify apoptosis. Plays a critical role in caspase-independent, pyknotic cell death in hydrogen peroxide-exposed cells. Binds to DNA in a sequence-independent manner.^[3] ^[4] ^[5]

Publication Abstract from PubMed

The apoptosis-inducing factor (AIF) is a mitochondrial-flavoprotein that, after cell death induction, is distributed to the nucleus to mediate chromatinolysis. In mitochondria, AIF is present in a monomer-dimer equilibrium that after reduction by NADH gets displaced toward the dimer. The crystal structure of the human AIF (hAIF):NAD(H)-bound dimer revealed one FAD and, unexpectedly, two NAD(H) molecules per protomer. A 1:2 hAIF:NAD(H) binding stoichiometry was additionally confirmed in solution by using surface plasmon resonance. The here newly discovered NAD(H)-binding site includes residues mutated in human disorders, and accommodation of the coenzyme in it requires restructuring of a hAIF portion within the 509-560 apoptogenic segment. Disruption of interactions at the dimerization surface by production of the hAIF E413A/R422A/R430A mutant resulted in a nondimerizable variant considerably less efficiently stabilizing charge-transfer complexes upon coenzyme reduction than WT hAIF. These data reveal that the coenzyme-mediated monomer-dimer transition of hAIF modulates the conformation of its C-terminal proapoptotic domain, as well as its mechanism as reductase. These observations suggest that both the mitochondrial and apoptotic functions of hAIF are interconnected and coenzyme controlled: a key information in the understanding of the physiological role of AIF in the cellular life and death cycle.

Structural insights into the coenzyme mediated monomer-dimer transition of the pro-apoptotic apoptosis inducing factor.,Ferreira P, Villanueva R, Martinez-Julvez M, Herguedas B, Marcuello C, Fernandez-Silva P, Cabon L, Hermoso JA, Lostao A, Susin SA, Medina M Biochemistry. 2014 Jul 1;53(25):4204-15. doi: 10.1021/bi500343r. Epub 2014 Jun, 20. PMID:24914854^[6]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Ghezzi D, Sevrioukova I, Invernizzi F, Lamperti C, Mora M, D'Adamo P, Novara F, Zuffardi O, Uziel G, Zeviani M. Severe X-linked mitochondrial encephalomyopathy associated with a mutation in apoptosis-inducing factor. Am J Hum Genet. 2010 Apr 9;86(4):639-49. doi: 10.1016/j.ajhg.2010.03.002. Epub, 2010 Apr 1. PMID:20362274 doi:10.1016/j.ajhg.2010.03.002
↑ Berger I, Ben-Neriah Z, Dor-Wolman T, Shaag A, Saada A, Zenvirt S, Raas-Rothschild A, Nadjari M, Kaestner KH, Elpeleg O. Early prenatal ventriculomegaly due to an AIFM1 mutation identified by linkage analysis and whole exome sequencing. Mol Genet Metab. 2011 Dec;104(4):517-20. doi: 10.1016/j.ymgme.2011.09.020. Epub, 2011 Sep 24. PMID:22019070 doi:10.1016/j.ymgme.2011.09.020
↑ Kim JT, Kim KD, Song EY, Lee HG, Kim JW, Kim JW, Chae SK, Kim E, Lee MS, Yang Y, Lim JS. Apoptosis-inducing factor (AIF) inhibits protein synthesis by interacting with the eukaryotic translation initiation factor 3 subunit p44 (eIF3g). FEBS Lett. 2006 Nov 27;580(27):6375-83. Epub 2006 Nov 3. PMID:17094969 doi:10.1016/j.febslet.2006.10.049
↑ Son YO, Jang YS, Heo JS, Chung WT, Choi KC, Lee JC. Apoptosis-inducing factor plays a critical role in caspase-independent, pyknotic cell death in hydrogen peroxide-exposed cells. Apoptosis. 2009 Jun;14(6):796-808. doi: 10.1007/s10495-009-0353-7. PMID:19418225 doi:10.1007/s10495-009-0353-7
↑ Ghezzi D, Sevrioukova I, Invernizzi F, Lamperti C, Mora M, D'Adamo P, Novara F, Zuffardi O, Uziel G, Zeviani M. Severe X-linked mitochondrial encephalomyopathy associated with a mutation in apoptosis-inducing factor. Am J Hum Genet. 2010 Apr 9;86(4):639-49. doi: 10.1016/j.ajhg.2010.03.002. Epub, 2010 Apr 1. PMID:20362274 doi:10.1016/j.ajhg.2010.03.002
↑ Ferreira P, Villanueva R, Martinez-Julvez M, Herguedas B, Marcuello C, Fernandez-Silva P, Cabon L, Hermoso JA, Lostao A, Susin SA, Medina M. Structural insights into the coenzyme mediated monomer-dimer transition of the pro-apoptotic apoptosis inducing factor. Biochemistry. 2014 Jul 1;53(25):4204-15. doi: 10.1021/bi500343r. Epub 2014 Jun, 20. PMID:24914854 doi:http://dx.doi.org/10.1021/bi500343r

1 Structural highlights
2 Disease
3 Function
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4bur"

@@ Line 1: / Line 1: @@
 ==Crystal structure of the reduced human Apoptosis inducing factor complexed with NAD==
 <StructureSection load='4bur' size='340' side='right' caption='[[4bur]], [[Resolution|resolution]] 2.88&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4bv6|4bv6]]</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4bur FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4bur OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4bur RCSB], [http://www.ebi.ac.uk/pdbsum/4bur PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4bur FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4bur OCA], [http://pdbe.org/4bur PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4bur RCSB], [http://www.ebi.ac.uk/pdbsum/4bur PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4bur ProSAT]</span></td></tr>
 </table>
 == Disease ==
@@ Line 19: / Line 20: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4bur" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>

4bur

From Proteopedia

Revision as of 18:03, 11 August 2016

Crystal structure of the reduced human Apoptosis inducing factor complexed with NAD

Structural highlights

Disease

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox